SN75123N Equivalent & Substitute Parts

Part Overview

The SN75123N is a 2/0 Driver IC manufactured by Texas Instruments in the 75000 series. This component is classified as an Interface driver with Through Hole mounting in a 16-DIP package. The product is currently listed as Obsolete, making identification of functionally equivalent alternatives necessary for ongoing system support and new design implementations.

Substiute Parts

SN75123N

Texas InstrumentsIn Stock: 3880SN75123N Datasheet

Current PartRFQ

SN65C1167ENSR

Texas InstrumentsIn Stock: 9568SN65C1167ENSR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

The SN65C1167ENSR qualifies as a manufacturer-recommended substitute based on the following substitution criteria:

Functional Compatibility: Both components are Texas Instruments interface ICs within the same product family (75000/65000 series). The SN65C1167ENSR provides enhanced functionality with 2/2 driver/receiver configuration and full-duplex RS422/RS485 protocol support, making it suitable for applications requiring the 2/0 driver capability of the SN75123N.

Electrical Parameters: Supply voltage ranges overlap within acceptable tolerance (SN75123N: 4.75V–5.25V; SN65C1167ENSR: 4.5V–5.5V). Both components operate on standard 5V logic supplies.

Compliance & Certification: Both parts maintain ROHS3 compliance and REACH Unaffected status, ensuring regulatory continuity in replacement scenarios.

Key Substitution Parameters:

• Interface category and driver functionality
• 16-pin package configuration
• 5V supply voltage compatibility
• ROHS3 and REACH compliance alignment

Parameter Comparison

Engineering Selection Recommendations

The SN65C1167ENSR is the manufacturer-recommended substitute for the obsolete SN75123N. Selection of this alternative is supported by:

Product Status: The SN75123N is obsolete with no ongoing manufacturing. The SN65C1167ENSR maintains Active product status with current inventory availability (9508 units in stock).

Regulatory Compliance: Both components maintain identical ROHS3 and REACH compliance certifications, ensuring no regulatory barriers to substitution.

Supply Voltage Compatibility: The SN65C1167ENSR supply voltage range (4.5V–5.5V) encompasses the SN75123N operating range (4.75V–5.25V), confirming electrical compatibility in standard 5V applications.

Functional Enhancement: The SN65C1167ENSR provides bidirectional transceiver capability (2/2 configuration) compared to the unidirectional driver configuration (2/0) of the SN75123N. This enhanced functionality supports broader application requirements while maintaining backward compatibility with driver-only use cases.

Package Consideration: The substitute uses Surface Mount (16-SOIC) packaging versus Through Hole (16-DIP) mounting. PCB layout redesign is required for implementation.

Frequently Asked Questions (FAQ)

Q: Can the SN65C1167ENSR directly replace the SN75123N without circuit modifications?

A: Electrical compatibility is confirmed within the 5V supply voltage range. However, the SN65C1167ENSR uses 16-SOIC surface mount packaging while the SN75123N uses 16-DIP through hole packaging. PCB layout and footprint redesign is necessary. Pin-to-pin functional mapping must be verified against specific application schematics.

Q: What is the primary reason for substitution?

A: The SN75123N is obsolete with no active manufacturing. The SN65C1167ENSR is the manufacturer-recommended active alternative from Texas Instruments.

Q: Are there compliance concerns with this substitution?

A: No. Both components maintain identical ROHS3 Compliant and REACH Unaffected certifications. Regulatory compliance is preserved.

Q: How do the driver/receiver configurations differ?

A: The SN75123N provides 2 drivers with 0 receivers (unidirectional output only). The SN65C1167ENSR provides 2 drivers and 2 receivers with full-duplex capability (bidirectional communication). Applications requiring only driver functionality can utilize the SN65C1167ENSR with receiver channels unused.

Q: What is the operating temperature range difference?

A: The SN75123N operates 0°C to 70°C. The SN65C1167ENSR operates -40°C to 85°C, providing extended temperature range capability suitable for industrial and automotive applications.

Q: Is the SN65C1167ENSR available in stock?

A: Yes. The SN65C1167ENSR has 9508 units in stock as new original inventory, ensuring supply availability for immediate implementation.